Tire valve core extractor



Oct. 19, 1937. w. T. CONRAD TIRE VALVE CORE EXTRACTOR Filed Oct. 17, 1934 d 1H 5 n zazze wfi z H 1 F 09 h 2 2 a m l a, w n. w; 7 1 2 1 mvewron William I C'onr'ati,

E ii ATTORNEY Patented Oct. 19, 1937 h UNITED STATES PATENT OFFICE TIRE vALvE ooltnnx'rnAo'rolt 7 William Conrad, Lawndale, Calif., assignor of forty-nine per cent to Daniel W. -Wal ters, West 7 Los Angeles, Calif.

Application October 1'7, 1934, Serial No. 748,749

1 Claim. (01. 81-3) This invention relates to means for removing parallel relation a distance sufficient to loosely and replacing pneumatic tire valve cores and receive the squared end 20 of the valve core 2|, the like, and it consists in the constructions, arand the intermediate portions of the outer faces rangements and combinations herein described, 22 of the jaws are formed with cam faces 22a,

5 and claimed. which coact with the camming surface M, as 5 It is an object of the invention to provide a will now be explained. valve core tool which may be incorporated as an With the construction described, it will be apintegral part of a tap or dust cap, or similar inparent that with the squared end 20 of the core strumentality which will function as a handle for interposed between the jaws ll, axial movement the expanding jaws of the tool. of the tap toward the core will cause the jaws 10 It is a further object of the invention to pro- I! to be flexed inwardly toward the squared end vide a chuck wherein the jaws thereof are readp on 0, e eby fi y pp the Core for ily caused to grip and hold a valve core upon removal or replacement. This gripping is effectslight axial movement of the handle member asd by e ea g action produced y engagesociated with the chuck and by reverse axial ment between the cam surface M of the bore 15 movement of the handle cause release of the and the cam 22 of the jaw core, thereby permitting quick removal or re- The cam faces 22 are quite short in length and placement of the valve core within a valve stem. bviously a short axial movement of the body Additional objects, advantages and features of I2 will house the cam faces within the bore I3.

invention will be apparent from the following de- Therefore the j ws ll Will fi y p d hold 20 scription considered in conjunction with the ach Core o a it y b readily ed as W companying drawing, wherein be required when removing or replacing the Figure l is a vertical sectional view of a tap core within a valve stem. An axial movement embodying my chuck; of the handle 12 in a direction away from the 25 Figure 2 is a cross section on the line 2 2 core 2| will release the jaws ll permitting them 25 of Figure 1. to return to their normal positions with conse- Figure 3 is a vertical sectional view of a dust q t e se f the Core.

cap embodying my invention. In Figures 3 and 4, I have illustrated the Figure 4 is a cross section on the line 4-4 of g pp aw as app d to a d n of a t e Figure 3. valve, and since the construction of the gripping 3 Figure 5 is an end elevation of the chuck jaws. jaws is similar to that first described, the same Reference is first made to Figures 1 and 2 of reference characters are employed to designate the drawing wherein there is illustrated generke el ments.

ally, a tire valve tap In which may be of con- The dust cap 30 includes the usual threaded ventional construction, including a threaded tap p g 3! for receiving a Valve Stem a im- 35 portion II and integrally connected body l2. e ately ther above a rubber asket or can 3 The body 12 has a bore l3, extending l ngit diis housed. The outer end of the cap 30 terminally thereof, stopping short intermediate the mates in a c uck dy 33 r receiving the hu k length of the body 12. The bore is preferably of .l WS The Chu b y 33 s a bore 34, the

circular formation, as viewed in cross section, the inner p end of Which is rounded as at and 40 outer open end of which is slightly rounded, as coacts with the cam faces 22a, as in the first at M, forming a carnming surface for actuating described form. the chuck jaws, as will be described hereinafter. At diametrically Op Sides of th chuck A chuck I5 is seated within the bore l3, longibody 33, the Wall thereof is cut longitudinally at tudinally slidable therein, but retained against suitable spa p as at and the material 45 withdrawal by virtue of a pin I 6 The Chu k [5 therebetween is bent inwardly toward each other, comprises a pair of jaws I! joined together by a ng l gs 31, the lugs being Positioned bebight portion I8, presenting a substantially U- tween e laws e y retaining the jaw shaped formation and as clearly illustrated in Wit n the bore 33.

Figure 1, the pin I6 is disposed transversely The actuation of the jaws IT in this instance 50 across the bottom and between the jaws l1, so is the same as in the preceding construction and that outward movement of the jaws is limited by therefore need no further description. However, virtue of engagement between the pin l6 and it should be noted the rubber gasket will permit the bight portion l8. the proper inward movement of the jaws, due to The inner faces I9 of the jaws are spaced in the inherent resilience of the gasket. 55

While I have shown and described preferred constructions of my valve extractor, I am well aware that modifications may be made, and I therefore consider as my own all such variations in construction as fairly fall within the scope of the appended claim.

I claim:-

A valve core extractor comprising a body member having a longitudinal bore formed therein, said bore having a tapered face adjacent an outer end thereof, a chuck member loosely engaged and slidable within the bore, said chuck member comprising a pair of jaws arranged in opposed relation and connected by a bight portion, a pin carried by the body member and extending transversely of the bore and between said jaws whereby to limit outward movement of the chuck, and said gripping jaws having straight parallel outer side portions and tapered faces intermediate the length of the jaws, said tapered faces being complemental to the tapered face of the bore but normally extending outwardly slightly beyond the circumference of the bore whereby movement of the body member toward said jaws will cause flexing of the jaws to permit said chuck member to move longitudinally inward of the bore to a point upon the parallel side portions of the jaws and beyond the outer edges of the tapered faces to hold the jaws in gripping action upon an interposed valve core.

WILLIAM T. CONRAD. 

